A VERTICAL HALF HANDOVER SCHEME FOR 5G BASED DEVICETO-DEVICE ULTRA DENSE NETWORKS

Abstract

Internet of things (IoT) is expected to have billions of heterogeneously connected devices, demanding
higher spectral efficiency, enhanced capacity and lesser latency. Device-to-Device (D2D) ultra-dense
networks (UDN) is one of the potential components of 5G. Due to smaller cell sizes, more frequent
handovers should be executed by the system. The devices should be always connected to the best
network, while achieving seamless mobility. The handover failure leads to packet loss and degrades
the quality of service (QoS). The unessential handover leads to wastage of resources. In this work, a
vertical half handover (VHO) scheme is proposed for D2D-UDN. The proposed scheme dynamically
selects two thresholds, which enables the system to maintain probability of VHO failure and
probability of unessential handover below the desired bounds than the other conventional schemes